Talking machine



w; RIVETT. TALKING MACHINE. v AFPLQCATION FILED APR. I8. I92].

Patented-Sept. 26, '1922.

2 SHEETS-SHEET 1.

a: i i

r INVENTOR il [a Q NH ATTO RN EY A. W. RIV ETT. TALKING MACHINE.

AFPLICATION FILED APR. 16. 1921.

Patented .26, 1922.

ETQ-SHEEI Patented Sept. 2%, 1922,

' ARTHUR W. BIVET'JP, 016' ST. LOUIS, IMISSOUR'I.

TALKING MACHINE.

1 To all 11; ham it may concern Be it known that I, ARTHUR WV. Rrvnrr, a citizen of the United States, residing at St. Louis city, in the county of St. Louis City and State of Missouri, have invented new and useful Improvements in Talking Ma chines, of which the following is a specification.

This invention relates to talking machines and has for its object the provision of a metal throat and tone chamber attached to a metallic modulator box, the modulator box being provided internally with a slidable block whereby communication through the device may be cut oif to a variable extent as may be desired.

An important object is the provision of a metallic throat member of this character which is so constructed that it is detachably connected with the modulator box so that it may or may not be used as preferred.

An additional object is the provision of a device of this character which will be simple and inexpensive in manufacture, highly eflicient in use, durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which Figure 1 is a longitudinal sectional view through a talking machine showing my device applied thereto,

Figure 2 is a section at right anglest'o Figure 1,

Figure 3 is a horizontal sectional view on the line 33 of Figure 1,

Figure 4 is a sectional view on the line 4-4 of Figure 1, and

The remaining figures are detail views.

Referring more particularly to the drawings, the numeral 10 designates a portion of a talking machine, the base plate of which is provided with a central opening 11 be neath which is secured a metallic rectangular box 12 which I call the modulator box and this box is held in position by means of suitable screws 13 or the like which pass through attaching feet 14 on the box. This box is formed on its underside with longitudinally extending guide flanges 15 which serve as retaining means and as guides for a block 16 which is slidable longitudinally of the box and which is provided with an operating rod 17 by means of which it may be moved to extend inmore or less obstructing relation to the hole 11. Thebottom'of the'box 12 is formed with a hole 18 registering with the hole 11 and surrounded by an inwardly extending tions 20.

The numeral 21 designates, the throat whlch is formed of metal and in preferably two sections bolted together, as indicated at 22. This throat 21 is of substantially l.- shape and is tapered throughout its length with its upper end formed with the, out wardly extending I flange 23 engageable against the bottom of the flange 1'9 and having its upper extremity formed with laterally extending lugs 24 adapted to be inserted through the'cut-out portions 20 so that when the throat is subsequently turned into the position shown in Figure 3, the lugs 24 will engage the top of the flange 19 and hold the throat in position.

flange 19 provided with cut-outpor- The lower end of the throat member is formed rectangular, as clearly shown in Figure 2, while the upper portion is circular in cross section and merges into the rectangular lower end. This rectangular lower end is open and is provided with an offset flange 25 providing an abutment shoulder 26. The tone chamber 27 is of usual shape and has its smaller end engaged'within the flanges 25.

Tn the operation of the device it will be seen that by sliding the block 16 within the box 12 so as to cover the opening 11 to, a greater or less extent, the tone may be varied at will, as will be obvious owing to the cutting off of more or less of the volume of sound passing through the throat member into the tone chamber.

While I have shown and described the preferred embodiment of my invention, it is of course to be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. In a talking machine having its sounding board formed with a hole, a boxing secured upon the underside of the sounding board at said holeand including longitudinally extending guides adapted to slidably support an adjusting block movable to cover and uncover said opening, said boxing being formed below said hole with a circular opening surrounded by an inwardly extending flange having slots at opposite sides, and a depending curved throat member having its upper end formed with aflange engageable against the underside of said first namec flange and being formed at its upper end with a pair of oppositely disposed lugs insertible through said recesses whereby to lock the throat in association with the boxing when the throat is subsequently partially rotated.

9;. ln a talking machine including base having a hole communicating with the tone arm of the machine, a box member secured beneath said hole and provided in its bottom with a hole registering therewith, a tone chamber, and a throat member connected with the tone chamber and with said box member, the bottom of said box member being formed with an inwardly extending flange at the opening therein, said flange being provided with cut-out portions, and the upper end of the throat member being formed with lugs passable through said outout portions and engageable upon the top of the flange when the throat member is subsequently rotated with respect to the box member.

In testimony whereoi ll affix my signature.

ARTHUR W. RIVETT. 

